Natalie & Nadiya
I have my reasons:
1. We have indications that they've made it to the F5/F4
2. We believe that they were racing as decoys in NYC (both of them were racing in the final Leg wearing slippers? Yeah right). Usually the decoy teams are the teams eliminated just before the F3.
3. My concrete evidence: a few days after filming wrapped up, one of the twins tweeted to the other, "still having bad dreams about France
". We are pretty sure that France was the penultimate Leg, right? And saying that you had 'bad dreams about France' is basically confirming that you were eliminated in France. When I saw this tweet, I re-tweeted it on purpose so one of the twins would realise what a spoiler they were releasing and they would delete it. Funnily enough, I went back later so print screen the tweet, and it was GONE!
If you look at all my statements, it all fits together and makes sense. Just be glad that we will be able to see an FF team race through 11 Legs!